Isn't that fun? Most amazing thing of all? They did it in a single take! Oh, there were plenty of takes before it all came together, but that video isn't spliced together; it's all done at once, start to finish. It boggles my mind!
I love the outtakes too, and if you go to about 6 mins into this video you can see the actual shoot, with the trainers out of camera view cueing the dogs, etc. Outtakes and Wide Angle